/*
 * Copyright (c) 2018-2020 "Graph Foundation,"
 * Graph Foundation, Inc. [https://graphfoundation.org]
 *
 * This file is part of ONgDB Enterprise Edition. The included source
 * code can be redistributed and/or modified under the terms of the
 * GNU AFFERO GENERAL PUBLIC LICENSE Version 3
 * (http://www.fsf.org/licensing/licenses/agpl-3.0.html) as found
 * in the associated LICENSE.txt file.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 */
/*
 * Copyright (c) 2002-2018 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.causalclustering.discovery;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

class CoreTopologyListenerService
{
    private final Set<CoreTopologyService.Listener> listeners;

    CoreTopologyListenerService()
    {
        this.listeners = ConcurrentHashMap.newKeySet();
    }

    void addCoreTopologyListener( CoreTopologyService.Listener listener )
    {
        listeners.add( listener );
    }

    void removeCoreTopologyListener( CoreTopologyService.Listener listener )
    {
        listeners.remove( listener );
    }

    void notifyListeners( CoreTopology coreTopology )
    {
        for ( CoreTopologyService.Listener listener : listeners )
        {
            String dbName = listener.dbName();

            listener.onCoreTopologyChange( coreTopology.filterTopologyByDb( dbName ) );
        }
    }
}
